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ASN Lookup Tool
AS17231 AT&T Enhanced Network Services

An Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.

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ASN Lookup for:

AS17231

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ASN Extended Info API
BGP Active Prefixes API
ASN Details JSON View

ASN Details

ASN
AS17231
Organisation
AT&T Enhanced Network Services
AS Name
ATT-CERFNET-BLOCK
IPv4 Addresses Announced
54,271
IPv4 Prefixes Announced
74
IPv6 Prefixes Announced
0
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#4,052 out of 75,628
Registry
Arin
Registered Country
US
Registration Date
2000-08-09
Registration Change
2000-08-09

Receiving From

ASN
Organisation
AS7018
AT&T Services, Inc.

Transit To

ASN
Organisation
AS65002
Private Use AS
AS6998
Concentrix CVG Brite Voice Systems LLC
AS30082
QS1 Data Systems
AS13788
US Courts
AS40458
CMFG Life Insurance Company
AS11880
Tickets.com, Inc.

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix 12.64.144.0/24
Range From 12.64.144.0
Range To 12.64.144.255
Prefix 12.64.145.0/24
Range From 12.64.145.0
Range To 12.64.145.255
Prefix 12.64.146.0/24
Range From 12.64.146.0
Range To 12.64.146.255
Prefix 12.64.147.0/24
Range From 12.64.147.0
Range To 12.64.147.255
Prefix 12.64.148.0/24
Range From 12.64.148.0
Range To 12.64.148.255
Prefix 12.64.149.0/24
Range From 12.64.149.0
Range To 12.64.149.255
Prefix 12.64.152.0/24
Range From 12.64.152.0
Range To 12.64.152.255
Prefix 12.64.153.0/24
Range From 12.64.153.0
Range To 12.64.153.255
Prefix 12.64.154.0/24
Range From 12.64.154.0
Range To 12.64.154.255
Prefix 12.64.155.0/24
Range From 12.64.155.0
Range To 12.64.155.255
Showing 10 of 74 Results View More >